| 
S.No | 
Core type transformer | 
Shell type transformer | 
| 
1 | 
Core is surrounded by winding | 
Winding is surrounded bycore | 
| 
2 | 
It has two limbs | 
It has three limbs | 
| 
3 | 
It is made up of two L shaped strips | 
It is made up of E and I shaped strips | 
| 
4 | 
Easy to dismantle the windings for repair work | 
Difficult to dismantle the windings for repair work | 
| 
5 | 
Better heat dissipation | 
Poor heat dissipation as the winding is surrounded
  by core. | 
